In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
13
The average person falls asleep in seven minutes.
115
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
If you hold farts in during the day, they'll just come out when you sleep.
16
A new parent will lose about 1055.6 hours of sleep in the first year of their child's life - almost 44 days!
6
Honeybees never sleep.
276
You forget 90% of your dreams.
256
The strangers in your dreams are actually people that you've seen in real life.
50